Fuse plug



H. N. DAVIS.

FUSE PLUG.

APPLICATION FILED JULY 8, I920.

1,414,864, Patented May 2,1922.

I I INI/ENTQR 54%. ATTORNEYS PQLIENT OFFICE.

HENRY N. DAVIS, OF INDEPENDENCE, MISSOURI.

FUSE PLUG.

Specification of Letters Patent.

Patented May 2,1922.

Application filed July 8, 1920. Serial No. 394,687.

To all whom it may concern 7 Be it known that I, HENRY N. DAVIS, a citizen of the United States, and a resident of Independence, in the county of Jackson and State of Missouri, have invented new and Improved Fuse Plugs, of which the following is a full, clear, and exact description.

This invention relates to improvements in fuse plugs, an object of the invention being to provide a device of this type which will be exceedingly simple in construction and practical and durable in use.

A further object is to provide a fuse plug which may be manufactured and sold at a very low price, and so constructed that an old fuse may be quickly removed and a new one readily inserted.

With these and other objects in view the invention consists in certain novel features of construction and combinations and arrangement of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings:

Figure l is a view in side elevation of my improved fuse plug.

Figure 2 is a view in vertical section of the same.

1 represents a plug which is formed of a single piece of porcelain or other insulating material, although any desired insulating or non-conducting material may be employed. The plug is shaped like the ordinary fuse plug now on the market, is largest at its outer end 2, threaded at its intermediate portion 3, and tapering at its inner end t. A diagonal passageway or opening 5 extends from the inner end 40f the plug to a point in the threaded intermediate portion thereof. A fuse 6 is located in the opening 5, one end of the fuse being at the inner end of the plug and the other end at the intermediate portion 3 thereof. Solder may be used to secure both ends of the fuse 6 in place as shown at 7 and 8 respectively. When the plug is inserted in the usual type of fuse box socket the solder at 7 and 8 willform contacts as will be readily understood.

This invention does away with the necessity of providing screw-threaded metal cas ings Or the expense of assembling the ordinary plugs and yet my improved plug functions equally as well as more complicated and expensive ones. Furthermore instead of buying a new plug when the fuse burns at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent is:

1. As a new article of manufacture, a fuse plug consisting of two members, one of said members comprising a solid body portion of insulating material having a passageway therein, the other of said' members comprising a fuse extending from end to end of the passageway.

2. As a new article of manufacture, a fuse plug consisting of two members, one of said members comprising a body portion of insulating material having a passageway therein, and the other of said members comprising a fuse located in the passageway, solder securing the ends of the fuse in the ends of the passageway and forming contacts.

-A device of the character stated comprising a plug of insulating material largest at its outer end, screw threaded at its intermediate portion and tapering at its inner end, having an opening therein extending from the inner end to the screw threaded portion thereof, and a fuse in the opening, and solder securing the ends of the fuse in the opening and forming contacts at the ends of the fuse.

4. As a new article of manufacture, a fuse plug consisting of two members, one of said members comprising a cylindrical body portion of insulating material having integral externalscrew threads around its intermediate portion and having a diagonal passageway therein communicating at one end with the screw threads, and a fuse located in and extending throughout the length of the passageway.

HENRY N. DAVIS. 

